<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>bootstrap</title>
    <link rel="stylesheet" href="css/bootstrap.min.css">
    
</head>
<body>
<ul class="nav nav-tabs">
  <li class="active"><a href="">Home</a></li> 
  <li><a href="">Profile</a></li> 
  <li><a href="">Messages</a></li>
</ul>

<ul class="nav nav-pills">
  <li class="active"><a href="">Home</a></li> 
  <li><a href="">Profile</a></li> 
  <li><a href="">Messages</a></li>
</ul>

<ul class="nav nav-pills nav-justified">
  <li class="active disabled"><a href="">Home</a></li> 
  <li><a href="">Profile</a></li> 
  <li><a href="">Messages</a></li>
</ul>


<ul class="nav nav-tabs">
  <li class="active"><a href="">1</a></li>
  <li><a href="">2</a></li>
  <li><a href="" data-toggle="dropdown">点击</a>
    <ul class="dropdown-menu">
      <li>aaaaaaa</li>
      <li>bbbbbbb</li>
    </ul>
  </li>
</ul>

<script src="js/jquery-3.6.0.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>